Transcription
Reinforcement Bars
ContentsAbout NatSteelSteel MakingSteel RollingAbout NatSteel’s Reinforcement BarsSpecifications of Reinforcement BarsApplicationsABOUTNATSTEELNatSteel Holdings – a leading Pan-Asiancompany that delivers premium steelproducts and solutions for theconstruction industryNatSteel traces its lineage to 1961, when itwas incorporated as National Iron and SteelMills. A pioneer and key partner in Singapore’snation building efforts, our products are usedin most construction projects island-wide,from the iconic Changi International Airportto the public housing that is the trademark ofSingapore’s landscape.Singapore is home to NatSteel’s headquarters,as well as its flagship plant, which boastsone of the largest single downstream rebarfabrication operations in the world. TheSingapore plant is the only local steel millwith an integrated upstream and downstreamoperation, where steel is manufacturedthrough recycling scrap, and fabricatedaccording to customers’ needs. Withoperations spanning across the region, thegroup has an annual steel production capacityof over 2 million tonnes.NatSteel today continues to build on itssuccess as a leading steel producer in AsiaPacific, with over 3,000 employees across theregion. Tata Steel is among the top global steelcompanies with an annual crude steel capacityof over 28 million tonnes with major footprints in India, the UK, Netherlands, Thailand,China and Australia. As part of the Tata Steelgroup, NatSteel is poised for further growth,with its sights set on becoming the global steelindustry benchmark for value creation andcorporate citizenship.1
STEELMAKINGThe only steel mill in Singapore, NatSteel has one of themost energy-efficient steel making operations in the world.Typical steel mills operate electric arc furnaces using morethan 400 kilowatt hours of energy to produce a tonne ofsteel. NatSteel does the same with 30% less energy.Melting ProcessProcessed metal waste is melted in the electricarc furnace with fuel oil burners and highvoltage current, enriched by oxygen jetting.Chemistry Refinement andTemperature ControlMolten steel is transferred to the 80-tonneLadle Furnace for chemistry refinement andtemperature control.Continuous CastingRefined molten steel flows through a 4-strandhigh speed caster. Billets are casted andare directly hot charged to the rolling mill,resulting in fuel oil savings.23
STEELROLLINGAt the Merchant Bar Mill, billets are heated in a reheatingfurnace and rolled through a sequence of rolling standswhich progressively reduce the billets to the final sizes ofreinforcement bars through an automated process. NatSteelis capable of using Micro Alloy or Tempcore heat treatmentprocess to produce high strength reinforcing bars which arehighly malleable and weldable.Reheat FurnaceFrom the meltshop, an automated conveyorsystem transfers billets into the reheat furnacefor rolling process, reducing the heat lossrequired for reheating and rolling.Rolling StandsA sequence of fully automated and watercooled roll stands that gradually reduce billetsto required sizes.Finished ProductsBillets are rolled into reinforcement bars.Small diameters rods are also produced at fastdesign speeds with precise tolerance controlusing a six-pass bar block.45
Physical Properties of Reinforcement BarsABOUT NATSTEEL’S HIGHSTRENGTH GRADE 600REINFORCEMENT BARSSingapore & MalaysiaEmploying advanced technology, NatSteel’s High Strength Grade 600reinforcement bars are manufactured in accordance to stringentworld-wide quality assurance min)Cal.methodSS560 : 2016SingaporeB500A500 - 650 8mm:1.02 8mm:1.05B500B500 - 650B600BBS 4449:2005United KingdomMS 146 : 2014MalaysiaElong(min %)Agt(min %)Bend(size : mm)Rebend(size : mm)Nominal 8mm : 1.0 8mm: 2.5 16mm :3D 16mm : 6D(160 - 180 ) 16mm : 4D 16mm : 7D(90 - 1hr - 20 )1.08Nominal5same as B500Asame as B500A600 - 7801.08Nominal5same as B500Asame as B500AB500B500 - 6501.08Nominal5 16mm : 4D 16mm : 7D(90 - 1hr - 20 )B500A500 - 650 8mm:1.02 8mm:1.05Nominal 8mm : 1.0 8mm : 2.5 16mm : 4D 16mm : 7D(90 - 1hr - 20 )B500B500 - 6001.08Nominal5same as al.methodAS/NZS 4671: 2001Australia/New Zealand500N500 - 6501.08Nominal500E500 - 600500LInternationalBenefits of using Grade 600 Steel Vs. Grade 500ItemDescriptionSteel SavingsPotential to reduce steel reinforcement by up to 20% compared to Grade 500 steelManpower - Steel fixing /InstallationUp to 20% less workers are required to install / fix steel reinforcement onsiteLogisticsUp to 20% less trucks delivering reinforcements to site – frees up site space and saves crane, manpower & timeSite CraneHandles up to 20% less steel and frees up crane time for other construction activities thereby speeding up constructionConcrete SavingsReduction in structural element size is possible when used with appropriate grade of concrete and results in overall dead load being reducedMore usable spaceMore floor space is usable with column size reductionLess formworkPossible to reduce formwork needed for Columns and Beams due to member size reductionLighter foundationsDue to reduction in members size resulting in lighter super structure, foundation loads and cost can be reducedStorage spaceSpace required for site storage of steel reinforcement can be reduced by up to 20%Improved SafetySite safety will be improved due to less material handling, steel fixing etcTime reductionOverall time savings can be accomplished by factoring in the earlier stated benefitsCost reductionOverall cost reduction can be achieved from reduced Material, Manpower, Construction Time etcEnvironmentReduced – Construction noise, Fuel consumption etcAgt(min %)Bend(size : mm)Rebend(size : mm)5all sizes : 4D( 16 bend 90 20 bend 180 ) 16mm : 4D 20mm : NA(90 - 1hr - 20 )1.15 - 1.40 Nominal10same as 500Nsame as 500N500 - 7501.03Nominal1.53D (90 )3D (90 - 1hr - 20 )250N2501.08Nominal5same as 500Nsame as 500N300E300 - 3801.15 - 1.50 Nominal15same as 500Nsame as 500NIS 1786 : 2008IndiaFe500D5001.1Effective165 20mm 3D 20mm 4D(180 ) 10mm 4D 10mm 6D(45 - 30min- 22.5 )SLS 375 : 2009Sri LankaRB 460460 8mm: 1.02 8mm: 1.05Effective14 8mm: 1.0 8mm: 2.53D(180 ) 16 4D 16 7D(90 - 60min - 20 )RB 500500 - 650 8mm: 1.02 8mm: 1.05Effective14 8mm: 1.0 8mm: 2.53D(180 ) 16 4D 16 7D(90 - 60min - 20 )Bj TS 40390560Nominal 32mm 1832 D 40mm 1640mm 145D(180 )Bj TS 50490620Nominal32mm 1432 D 40mm 1240mm 10 25mm 5D 25mm 6D(180 )CSA G30.18 - 09 2012Canada400W400 - 525540Nominal10 M D 25 M 1330 M D 55 M 1210 M - 15 M 3D20 M - 25 M 4D30 M - 35 M 6D45 M - 55 M 8D(180 )ASTM A615United StatesG60420620Nominal3 - 5 3.5D6 - 8 5D9 - 11 7D14 - 18 9D(180 )G40280420Nominal3,4,5 3.5D6 5D(180 )SNI 07 - 2052 - 2002IndonesiaSteel mass for various reinforcement bar sizesMild steel round barTensilemin(N/mm2)Deformed BarsDiameter (mm)68101310131620222528324050Mass 43.8544.8346.3139.86415.413Length (m)66121212121212121212121212Weight / bundle 2.1272.0882.1212.1312.0351.15*Bundle sizes may vary6Elong(min %)7
PROMISE OF QUALITYTO CUSTOMERS NatSteel’s rigourous quality checking and assurance process ensures the quality of its steelproducts delivered to customers The company’s products are certified to national and international standards for local use aswell as export to numerous overseas marketsNatSteel has a rigourous quality checking and assurance process toensure the quality of its steel products delivered to customers. This is toavoid potential project delays or consequential costs resulting from theuse of non-complying building materials.NatSteel supplies steel materials in accordance to current standardssuch as SS560, BS4449 and is also certified to other internationalstandards by certification bodies such as SIRIM, SNI, BIS, SLS and ACRSfor export to numerous overseas markets.The certification scheme for continuous productionconsists of three stages:1. Suitability testingThis ensures that the producer (NatSteel in this instance)has the capability and resources to produce reinforcingsteel in accordance with the requirements specified inthe product standards.5 0 0 EM A2. Internal inspection by the producerThis ensures that the level of quality remains satisfactorywith time through continuous internal inspection ofproduction by the producer.3. Inspection and supervision by an external bodyExternal inspection and supervision is carried outat maximum intervals of six months, to check thecompliance of continuous inspection of the conditionsof production.6 0 08The certification of NatSteel’s product according tonumerous standards is a testament to the company’sstringent quality assurance and checking framework.9
www.natsteel.com.sgNatSteel Holdings Pte Ltd22 Tanjong Kling RoadSingapore 628048T: 65 6265 1233F: 65 6265 8317E: sales@natsteel.com.sgW: www.natsteel.com.sgCo. Reg. No. 200810196Z 2015 NatSteel Holdings Pte Ltd. All rights reserved.No portion of this publication may be produced or copied in any form or byany means without the written permission of NatSteel Holdings Pte Ltd.Cert no: 92-2-0081SS ISO 9001 : 2008Cert no: 2000-0105SS ISO 14001 : 2004Cert no: OHS -2003-0057 Cert no: EnMS-2012-0001SS ISO 50001 : 2011BS OHSAS 18001 : 2007
Weight / bundle (mt)* 1.002 1.005 2.006 2.013 2.029 2.026 2.046 2.071 2.005 2.127 2.088 2.121 2.131 2.035 *Bundle sizes may vary ABOUT NATSTEEL’S HIGH STRENGTH GRADE 600 REINFORCEMENT BARS Employing advanced technology, NatSteel’s High Strength Grade 600 reinforcement bars are manufactured in accordance to stringent
